Helmet including a strap retainer



FIG. 1 is a rear perspective view of a helmet including a strap retainer;

FIG. 2 is a rear view thereof;

FIG. 3 is a side view thereof, the opposite side being a mirror image;

FIG. 4 is a top view thereof; and,

FIG. 5 is a front view thereof. 

CLAIM The ornamental design for a helmet including a strap retainer, as shown and described. 